Reducing distillery-slop to dry feed.



i No Drawing.

mason ALLEN norrmnnn, 'or-rnannron'r, KENTUCKY.

REDUCING ms'rILLnnY-sLoP TQ DRY FEED.

S pecifioatton of Letters Patent.

Patented M 26, mm.

. Applicationfiled June 24, 1909. Serial No. 504,094.

To all whom-it may concern:

Be it known that I, EDSON ALLEN 1161+; MANN, a citizen of the United States, and resident of Frankfort, Kentucky, have in-' vented certain new and useful ImprovementsirpReducing Distillery-Slop to Dry Feed, ofwhich the following is a specific'a tion.

My invention relates to an improved method of pducing distillery slop to dry feed, and has for its object to facilitate the separation of the nutritious elements ,or ingredients of distillery slop from the nonnutritious liquid in which they are contained, and to leave'a liquid residue which may berun into streams, cess-pools or other 3 sewage mediums without creating a nuisauce.- I

My process maybe described as follows. The slop formedinth'e' distillery beer still (meaning thereby the receptacle of i that name employed in whisky and spirits distilleries) is withdrawn therefrom and strained or run through the ordinary screen to separate the same into two portions,'namely, a heavier and decidedly viscous portion, which may be termed for convenience, and

I for the purposes of my claims,thick slopl"; -anda lighter and less viscous portion, which may, for like purposes, be called thin slop)- As is well known in this art, the slop is originally strong in acid contents, and among the acid contents is lactic acid, which is non-volatile. .It is not destrable, and is no object to my invention, to completely 1 neutralize such acid contents of the slop; where neutralizing alkaline agents have been added to the whole slo as it comes from the beer still, irfl'the pr or art, the finished product, or cattle feed, has been totally lackmgin acid contents, or has contained. deleterious quantities of the neutralizing agent, and moreover, it has not been possib e 'to. ex:

tract from the slop more than ten and onehell pounds of dried feed to the bushel of gram 1n the mash, as a maximum, ornine pounds [as an averagel such neutralizing a ents are used in my process, they are not a dedto the whole slop as 1t comes from the beer still, and they are not added merely for thepurpose of neutralizing the acid contents from the mass,

but for the ur ose of facilitating the .reduction oft 1e l quid slop to dry feed, and

or'- the conservation of the protein contained While, therefore,

the consideration of the next step of my process.

The first step as just described is well known in the art. It isa common expedient to separate .the mass intothick and thin slop, and the latter is or may be partly used for filling up the fermenting tubs in the distillery; frequently one-half of such thin slop being so employed. The remainder of the thin slop has usually been fed to cattle, or thrown away as waste therein. llVith which explanation, I pass to where local conditions prohibit the feeding V of cattle. It has been attempted to utilize this thin slo by pumping it into the filter ress in a I ixture with the thick slop, ecause the strained slop contains a high percentage of nutritive'substance, the percentage being equal to, if not greater than, that contained in the thick slop.

But when so pumped into the filter press the "glutenfwhich forms its most valuable ingredient, clogs up the filtering screens to an extent which renders the filter press inoperative, and as its nutritious. elements are held in suspension in a very finely divided condition, they have either passed through the filtering screens or have been blown out through the joints of the filter press. Again,

the use ,of evaporating pans injthe treatment. of the thin slop has involved costly machinery, and made the cost of production excessive. My second step is the addition to the thin slop .of an alkaline agent ."(such as lime, caustic soda, caustic potash,

to an extent which will produce the coagulation thereof. The coagulatedthin slop 1S.I16Xl'r barium hydrate, ammonia or soda) heated to boiling temperature ltho'ugli less favorable results can be obtained by omitting said heating to boiling teniperature), mixed with: the thick slop, the

ods of the prio art, and the product of my process is considerably richer in protein and 1 fat than thatheretofore produced in the art.

In addition to which advantages, the water finally discharged from the filter press is i'nofi'ensive and may be run into streams or sewers without creating a nuisance.

Having fully described my invention, whats]:- claim as new and desire to have secured to me by. the grant of Letters Patent, is:

1. The method of reducin distillery slop to dry feed comprising the ollowing steps;

separating the slop as it is withdrawn from the distillery beer still into. thick slop and thin slop; mixing with the thin slop a sufficient quantity of alkaline substance to coagulate the same; mixing the coagulated thin slop with the thick slop; filterlng the mixture to separatefthe water from the mass, and drying the-mass,'substant-ially as described. m

2. The method of reducing distillery slop to dry f eed comprising the following steps; separating the slop as it is formed in the distillery beer; still into thick slop and thin slop; heating the thin slop to boiling tem-- perature; adding to the boiling thin slop a sufi'icient quantity of alkaline substance to coagulatethe same; mixing the thick slop and treated thin slop; filtering the mixture to separate the water from the mass; and drying the remainder, substantially as described] Y In testimony whereof, I have signed my name to this specification, in presence of two subscribing witnesses.

' EnsoN ALLEN HOFFMANN. 

